package com.ldx.springbootjwt.util;

import com.auth0.jwt.JWT;
import com.auth0.jwt.JWTCreator;
import com.auth0.jwt.algorithms.Algorithm;
import com.auth0.jwt.interfaces.DecodedJWT;

import java.util.Calendar;
import java.util.Map;

public class JWTUtil {
    private  static final String SIGN = "!9@y%nxdk553";

    /**
     * 生成token header.payload.sign
     * @param map
     * @return
     */
    public static String  getToken(Map<String,String>map) {
        Calendar instance = Calendar.getInstance();
        instance.add(Calendar.DATE,7);//默认7天过期

        //创建jwt builder
        JWTCreator.Builder builder = JWT.create();

        //payload
        map.forEach((k,v)->{
            builder.withClaim(k,v);
        });

        String token = builder.withExpiresAt(instance.getTime())//指定令牌过期时间
                .sign(Algorithm.HMAC256(SIGN));//sign
        return token;
    }

    /**
     * 验证token合法性
     * @param token
     */
    public static void verify(String token) {
        JWT.require(Algorithm.HMAC256(SIGN)).build().verify(token);
    }

    /**
     * 获取token信息方法
     * @param token
     * @return
     */
    public static DecodedJWT getTokenInfo(String token) {
        DecodedJWT verify = JWT.require(Algorithm.HMAC256(SIGN)).build().verify(token);
        return  verify;
    }
}
